{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a90f37e3d7acfd9824f162830583bbf7846fe252"
            },
            {
              "fixed": "d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644"
            },
            {
              "fixed": "b862996e5105be1293da9cdc85da77b76021c3bd"
            },
            {
              "fixed": "2f8ed71aaaba3bc8b19cd9930cc62e63e142b299"
            },
            {
              "fixed": "eac6917a42899aad0617bbf04798c5dd946a1fe5"
            },
            {
              "fixed": "b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.6.32"
            },
            {
              "fixed": "6.6.158"
            },
            {
              "fixed": "6.12.112"
            },
            {
              "fixed": "6.18.54"
            },
            {
              "fixed": "7.2.8"
            },
            {
              "fixed": "7.3-rc4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98405.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix missing iov bounds check in parse_posix_sids()\n\nIn parse_posix_sids(), sidsbuf_end is calculated using the server-supplied\nout_len without being validated against the actual length of the received\niov (iov_len).\n\nIf a server provides an inflated out_len, sidsbuf_end will point past the\nend of the iov. This defeats the bounds guards in posix_info_sid_size(),\nallowing out-of-bounds reads into adjacent kernel memory.\n\nFix this by rejecting responses where the calculated sidsbuf_end would\nexceed the received iov boundaries or cause pointer wraparound.",
  "id": "CVE-2026-98405",
  "modified": "2026-10-16T02:31:07.744208251Z",
  "published": "2026-10-14T13:27:40.589Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f8ed71aaaba3bc8b19cd9930cc62e63e142b299"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b862996e5105be1293da9cdc85da77b76021c3bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eac6917a42899aad0617bbf04798c5dd946a1fe5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98405.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98405"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "smb: client: fix missing iov bounds check in parse_posix_sids()"
}